Mysterious!: Third Longest River in the World turns Red

On 7th September, 2012, 'golden water course', the longest river in Asia and third longest in the world turned Blood Red. The river is located in Yangtze, China. The river runs through the largest commecial and industrial centre in Chongqing. News.com.au reports that Chinese officials have blamed industrial pollutions for sudden discolouration of the river. Reasons for discoloration is yet to be known.
Could there be a Pharaoh hanging around?